单项选择题
herequirementforhighavailabilitywithintheDataCenternetworkmaycausethedesignertoconsiderwhichoneofthefollowingsolutions?()
A.ConstructahierarchicalnetworkdesignusingEtherChannelbetweenaserverandtwoVDCsfromthesamephysicalswitch
B.UtilizeCiscoNSFwithSSOtoprovideintrachassisSSOatLayers2to4
C.DefinetheDataCenterasanOSPFNSSAarea,advertisingadefaultrouteintotheDCAndsummarizingtheroutesoutoftheNSSAtotheCampusCore
D.ImplementnetworkservicesfortheDataCenterasaseparateserviceslayerusingactive/activemodelthatismorepredictableinfailureconditions